This could monitor for errors in specific memory regions critical to spacecraft operations. The detection could rely on: parity checks (identifies discrepancies in the number of 1s in the data), hamming code (detects and corrects bit flips in a data block), checksums (compares recalculated checksum values with expected results to flag corruption), redundancy (cross-checks repeated data instances for inconsistencies.) By focusing on memory regions directly, this targets areas most vulnerable to SEU or malicious interference, ensuring precise monitoring of critical memory segments.
| ID | Name | Description | |
| EX-0007 | Trigger Single Event Upset | Threat actors may utilize techniques to create a single-event upset (SEU) which is a change of state caused by one single ionizing particle (ions, electrons, photons...) striking a sensitive node in a spacecraft(i.e., microprocessor, semiconductor memory, or power transistors). The state change is a result of the free charge created by ionization in or close to an important node of a logic element (e.g. memory "bit"). This can cause unstable conditions on the spacecraft depending on which component experiences the SEU. SEU is a known phenomenon for spacecraft due to high radiation in space, but threat actors may attempt to utilize items like microwaves to create a SEU. | |
| EX-0012.01 | Registers | Threat actors may target the internal registers of the victim spacecraft in order to modify specific values as the FSW is functioning or prevent certain subsystems from working. Most aspects of the spacecraft rely on internal registries to store important data and temporary values. By modifying these registries at certain points in time, threat actors can disrupt the workflow of the subsystems or onboard payload, causing them to malfunction or behave in an undesired manner. | |